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1

Jerabek, Jakub, Allessandra Keil, Jens Schoene, Rostislav Chudoba, Josef Hegger, and Michael Raupach. "Experimental and Numerical Analysis of Spalling Effect in TRC Specimens." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244046893347-05461.

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The paper presents the study of spalling effect occurring under tensile loading in thin-walled TRC specimens. The experimentally observed failure patterns are first classified and the performed experiment design is explained and discussed. A parameter study of spalling effect with varied thickness of concrete cover and reinforcement configurations including both the textile fabrics and the yarns provided the basis for numerical analysis of the effect. The applied numerical model was designed in order to capture the initiation and propagation of longitudinal cracks leading to the separation of
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2

Connolly, Raymond J. "The spalling of concrete in fires." Thesis, Aston University, 1995. http://publications.aston.ac.uk/14310/.

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The occurrence of spalling is a major factor in determining the fire resistance of concrete constructions. The apparently random occurrence of spalling has limited the development and application of fire resistance modelling for concrete structures. This Thesis describes an experimental investigation into the spalling of concrete on exposure to elevated temperatures. It has been shown that spalling may be categorised into four distinct types, aggregate spalling, corner spalling, surface spalling and explosive spalling. Aggregate spalling has been found to be a form of shear failure of aggregat
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3

Jansson, Robert. "Fire Spalling of Concrete : Theoretical and Experimental Studies." Doctoral thesis, KTH, Betongbyggnad, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-128378.

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Fire spalling of concrete is not a new phenomenon. To some degree there has always been a risk during rapid heating of concrete. Therefore, to a certain degree the effect of fire spalling is included in the bank of data from fire tests and fires on which our understanding of the fire resistance of concrete is based. However, the development and modern use of more dense concrete mixes have produced cases of very severe fire spalling which have increased the urgency to understand this phenomenon. In this context, the use of an addition of polypropylene (PP) fibres to the mix to limit the amount
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4

Jansson, Robert. "Material properties related to fire spalling of concrete /." Lund : Division of Building Materials, Lund Institute of Technology, Lund University, 2008. http://www.byggnadsmaterial.lth.se/.

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5

Thiruchelvam, Chellathurai. "Deterioration and spalling of high strength concrete at elevated temperatures." Thesis, City University London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274476.

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6

Yanko, William Andrew. "Experimental and numerical evaluation of concrete spalling during extreme thermal loading." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0006380.

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7

Khalid, Nibras Nizar. "STRENGTH REDUCTION OF REINFORCED CONCRETE COLUMNS SUBJECTED TO CORROSION RELATED COVER SPALLING." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron152536559529405.

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8

Khoylou, Naysan. "Modelling of moisture migration and spalling behaviour in non-uniformly heated concrete." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/7317.

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9

Busba, Ezeddin Rafaa. "Effect of Localized Corrosion of Steel on Chloride-Induced Concrete Cover Cracking in Reinforced Concrete Structures." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4872.

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Abstract: Concrete cover cracking due to reinforcement corrosion is widely accepted as a limit-state indicator in defining the end of functional service life for existing reinforced concrete (RC) structures undergoing corrosion. Many of the currently available durability prediction models are incapable of providing realistic estimates of remaining service lives of RC structures beyond the corrosion initiation point. Therefore, the need to incorporate the length of the corrosion propagation stage in a comprehensive durability prediction approach has recently received much research attention. Pr
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10

Khalaf, Jamal. "Development of non-linear bond stress-slip models for reinforced concrete structures in fire." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/14863.

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Exposure of concrete structures to high temperatures leads to significant losses in mechanical and physical properties of concrete and steel reinforcement as well as the bond characteristics between them. Degradation of bond properties in fire may significantly influence the load capacity of concrete structures. Therefore the bond behaviours need to be considered for the structural fire engineering design of reinforced concrete structures. At present, the information about the material degradations of concrete and reinforcing steel bars at elevated temperatures are generally available. However
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11

Miah, Md Jihad. "The effect of compressive loading and cement type on the fire spalling behaviour of concrete." Thesis, Pau, 2017. http://www.theses.fr/2017PAUU3015/document.

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La recherche présentée dans cette thèse vise à examiner le mécanisme d’écaillage des bétons exposés au feu et comprendre l’influence du chargement mécanique appliqué en compression durant le chauffage. Des cubes (200 x 200 x 200 mm3) et des dalles (800 x 800 x 100 mm3) de béton fabriqués avec des ciments CEM II et CEM III (B40-II et B40-III: fc28days ≈ 40 MPa) ont été exposés à un feu ISO 834-1 sous différents niveaux de chargement uniaxial (cubes) et biaxial (dalles). En outre, l'effet du chargement mécanique (pression de confinement et charge uniaxiale) sur la perméabilité résiduelle au gaz
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12

Dauti, Dorjan. "A combined experimental and numerical approach to spalling of high-performance concrete due to fire." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAI062/document.

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Le béton est un matériau très utilisé dans l'industrie de construction. Une limite essentielle à un usage de ce matériau est sa dégradation par écaillage lorsqu’il est exposé au feu. Le phénomène d'écaillage consiste en une éjection du béton sous forme d'écailles à la surface du béton exposée à l'incendie. La section de béton s'en trouve progressivement réduite. De plus, ce phénomène expose les armatures et peut conduire à une rupture prématurée de structures telles que les tunnels, les gratte-ciels, les centrales nucléaires etc. De nombreuses recherches ont été consacrées à la mise au point d
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13

Ichikawa, Yoshikazu. "Prediction of pore pressures, heat and moisture transfer leading to spalling of concrete during fire." Thesis, Imperial College London, 2000. http://hdl.handle.net/10044/1/8721.

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14

Zaina, Mazen Said Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Strength and ductility of fibre reinforced high strength concrete columns." Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2005. http://handle.unsw.edu.au/1959.4/22054.

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The main structural objectives in column design are strength and ductility. For higher strength concretes these design objectives are offset by generally poor concrete ductility and early spalling of the concrete cover. When fibres are added to the concrete the post peak characteristics are enhanced, both in tension and in compression. Most of the available experimental data, on fibre reinforced concrete and fibre reinforced high strength concrete columns, suggest that an improvement in both ductility and load carrying capacity due to the inclusion of the fibres. In this thesis the ductility
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15

Sergi, George. "Corrosion of steel in concrete : cement matrix variables." Thesis, Aston University, 1986. http://publications.aston.ac.uk/14236/.

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16

Bosnjak, Josipa [Verfasser], and Joško [Akademischer Betreuer] Ožbolt. "Explosive spalling and permeability of high performance concrete under fire : numerical and experimental investigations / Josipa Bosnjak. Betreuer: Josko Ozbolt." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://d-nb.info/1058362151/34.

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Bošnjak, Josipa [Verfasser], and Joško [Akademischer Betreuer] Ožbolt. "Explosive spalling and permeability of high performance concrete under fire : numerical and experimental investigations / Josipa Bosnjak. Betreuer: Josko Ozbolt." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-95122.

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18

Mohammadi, Hosinieh Milad. "Behaviour of High Performance Fibre Reinforced Concrete Columns under Axial Loading." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30726.

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When compared to traditional concrete, steel fibre reinforced concrete (SFRC) shows several enhancements in performance, including improved tensile resistance, toughness and ductility. One potential application for SFRC is in columns where the provision of steel fibres can improve performance under axial and lateral loads. The use of SFRC can also allow for partial replacement of transverse reinforcement required by modern seismic codes. To improve workability, self-consolidating concrete (SCC) can be combined with steel fibres, leading to highly workable SFRC suitable for structural applicati
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19

Mullins, Sarah K. "The Evaluation on the Effectiveness of Hydrodemolition and Polyaspartic Sealing for Bridge Parapet Wall Protection." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1543920461272325.

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20

Barbiero, Marialuisa. "Cover cracking of concrete slabs induced by rebar corrosion." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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The phenomenon of concrete cracking due to corrosion of embedded reinforcement steel bars in concrete has been investigated for years. As a consequence of the steel corrosion that is accelerated by cold climates, sea water, spray and from chloride-based acceleration agents, internal cracks form. These agents originate a slow propagation of corrosion products around the embedded steel, forming a passive film, which can be elementary understood as a radial force present all around the steel, creating compressive stresses in concrete. This pressure causes the formation of microcracks that permit
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21

Kirchhof, Larissa Degliuomini. "Estudo teórico-experimental da influência do teor de umidade no fenômeno de spalling explosivo em concretos expostos a elevadas temperaturas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/32002.

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Os concretos de alta compacidade, com resistências elevadas (acima de 40 MPa), estão começando a ser cada vez mais usados em obras de infraestrutura e em edificações de grande porte, devido às importantes vantagens que os mesmos oferecem em termos de capacidade de carga e durabilidade. Um dos pontos acerca de seu desempenho que levanta dúvidas envolve o seu comportamento frente a elevadas temperaturas. Evidências coletadas em incêndios ocorridos em estruturas reais, como o do Channel Tunnel e do Mont Blanc Tunnel, indicaram que, sob certas circunstâncias, existe a possibilidade de ocorrência d
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22

Katsanos, Alexandros. "Effects of acetate-based de-icers on concrete reinforced and the cement matrix." Thesis, University of Surrey, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533178.

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23

Haber, Zachary. "ON THE USE OF POLYURETHANE MATRIX CARBON FIBER COMPOSITES FOR STRENGTHENING CONCRETE STRUCTURES." Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4105.

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Fiber-reinforced polymer (FRP) composite materials have effectively been used in numerous reinforced concrete civil infrastructure strengthening projects. Although a significant body of knowledge has been established for epoxy matrix carbon FRPs and epoxy adhesives, there is still a need to investigate other matrices and adhesive types. One such matrix/adhesive type yet to be heavily researched for infrastructure application is polyurethane. This thesis investigates use of polyurethane matrix carbon fiber composites for strengthening reinforced concrete civil infrastructure. Investigations on
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24

Nince, Andréia Azeredo. "Lascamento do concreto exposto a altas temperaturas." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3146/tde-27072007-143816/.

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Esta pesquisa foi motivada pela existência de controvérsia na literatura sobre concreto exposto a altas temperaturas, das dúvidas ainda por solucionar acerca da matéria e da lacuna na norma brasileira para a matéria. Este tema reapareceu após os vários acidentes em túneis ao redor do mundo ocorridos nos últimos dez anos, nos quais se verificou a ocorrência de lascamento explosivo de forma intensa, afetando a estabilidade estrutural. O objetivo principal da tese é correlacionar os parâmetros tecnológicos de dosagem (relação água/cimento, teor de argamassa e consumo total de água) às condições d
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25

Azzam, Aussama, and Mike Richter. "Investigation of Stress Transfer Behavior in Textile Reinforced Concrete with Application to Reinforcement Overlapping and Development Lengths." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-77838.

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Die kontinuumsmechanische Untersuchung der Lastübertragungsmechanismen zwischen den Rovings im textilbewehrten Feinbeton trägt wesentlich zum Gesamtverständnis des mechanischen Verhaltens des Verbundmaterials bei. Neben der Erfassung der gegenseitigen Beeinflussung sich kreuzender Rovings erfordert insbesondere die mechanische Modellierung und numerische Simulation von Bewehrungsstößen und Endverankerungen die Kenntnis dieser Übertragungsmechanismen. Die numerischen Simulationen sollen u. a. zeigen, welche Endverankerungslängen und welche Übergreifungslängen an Bewehrungsstößen erforderlich si
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26

Perez, Garcia Ramon. "Increasing the Blast Resistance of Concrete Masonry Walls Using Fabric Reinforced Cementitious Matrix (FRCM) Composites." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42095.

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Unreinforced masonry (URM) walls are often used as load-bearing or infill walls in buildings in many countries. Such walls are also commonly found in existing and heritage buildings in Canada. URM walls are strong structural elements when subjected to axial loading, but are very vulnerable under out-of-plane loads. This type of loading may come from different sources , including seismic or blast events. When subjected to blast, wall elements experience large pressures on one of their faces due to the high pressure produced in the air when an explosion takes place. This wave of compressed air t
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27

Xie, Hongbin Brown E. R. "Determining the optimum compaction level for designing stone matrix asphalt mixtures." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/doctoral/XIE_HONGBIN_54.pdf.

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28

Dubey, Ashish. "Fiber reinforced concrete, characterization of flexural toughness and some studies on fiber-matrix bond-slip interaction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0023/NQ38880.pdf.

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29

Kravaev, Plamen, Steffen Janetzko, Thomas Gries, et al. "Commingling Yarns for Reinforcement of Concrete." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244040840310-74290.

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Textile reinforced concrete (TRC) is an innovative composite material, which is being intensely and practice-oriented investigated on national and international level. In the last few years this material has gained increasing importance in the field of civil engineering. In the context of the collaborative research project SFB 532 at the RWTH Aachen University, research was carried out to understand and to predict the behaviour of different yarn structures in fine grained concrete. Based on the results, innovative commingling yarns were made of alkali-resistant glass fibres and water soluble P
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30

Song, Gao. "Matrix manipulation to study ECC behaviour." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/4647.

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Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2005.<br>192 leaves on CD format, preliminary i-xii pages and numbered pages 1-135. Includes bibliography, list of figures and tables.<br>ENGLISH ABSTRACT: As a fibre reinforced material, engineered cementitious composite (ECC) has tough, strain-hardening behaviour in tension despite containing low volumes of fibres. This property can be brought about by developments in fibre, matrix and interfacial properties. Poly Vinyl Alcohol (PVA) fibre has been developed in recent years for ECC, due to its high tensile strength and elastici
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31

Bozkurt, Emrah Tanoğlu Metin. "Mechanical and thermal properties of non-crimp glass fiber reinforced composites with silicate nanoparticule modified epoxy matrix/." [s.l.]: [s.n.], 2006. http://library.iyte.edu.tr/tezler/master/makinamuh/T000517.pdf.

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Thesis (Master)--İzmir Institute of Technology, İzmir, 2006<br>Keywords: polymer composites, Nanoparticles, glass fiber, mechanical properties, thermal properties. Includes bibliographical references (leaves 75-79).
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32

Hothan, Sascha, and Daniel Ehlig. "Hochtemperaturverhalten von Stahlbetonplatten mit Textilbetonverstärkung." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-78024.

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Die Verwendung von Endlosfilamenten aus Carbon als Bewehrungsmaterial für Beton, sogenannter Textilbeton, bietet die Möglichkeit der Sanierung und der Verstärkung bestehender Stahlbetonkonstruktionen. Dabei muss die Frage nach dem Feuerwiderstand von derart verstärkten Tragwerken beantwortet werden. Aufschluss darüber liefern Brandversuche. Mit Textilbeton verstärkte Stahlbetonplatten haben in Brandversuchen nach der Einheits- Temperaturzeitkurve bei 33 % der Traglast mehr als 60 Minuten standgehalten. Bei 50 % der Traglast kam es nach einer Branddauer von 55 Minuten, bei 65 % nach 30 Minuten,
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33

Jesse, Frank. "Tragverhalten von Filamentgarnen in zementgebundener Matrix." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2005. http://nbn-resolving.de/urn:nbn:de:swb:14-1122970324369-39398.

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Die Arbeit stützt sich überwiegend auf die Ergebnisse experimenteller Untersuchungen. Einaxiale Zugversuche an scheibenförmigen Probekörpern bildeten die Basis für die Beschreibung des Tragverhaltens in Form von Spannungs-Dehnungs-Linien. Da die Durchführung von Zugversuchen bekanntlich nicht ganz problemlos ist, wird der Versuchsaufbau besonders sorgfältig dargestellt. Mängel und deren Auswirkung auf die Versuchsergebnisse werden ausführlich diskutiert. Für die Beurteilung der Verbundeigenschaften der Bewehrung ist der Umfang der Kontaktfläche mit der Matrix ein wichtiger Parameter. Es wurde
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Jesse, Frank. "Tragverhalten von Filamentgarnen in zementgebundener Matrix." Doctoral thesis, Technische Universität Dresden, 2004. https://tud.qucosa.de/id/qucosa%3A24549.

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Die Arbeit stützt sich überwiegend auf die Ergebnisse experimenteller Untersuchungen. Einaxiale Zugversuche an scheibenförmigen Probekörpern bildeten die Basis für die Beschreibung des Tragverhaltens in Form von Spannungs-Dehnungs-Linien. Da die Durchführung von Zugversuchen bekanntlich nicht ganz problemlos ist, wird der Versuchsaufbau besonders sorgfältig dargestellt. Mängel und deren Auswirkung auf die Versuchsergebnisse werden ausführlich diskutiert. Für die Beurteilung der Verbundeigenschaften der Bewehrung ist der Umfang der Kontaktfläche mit der Matrix ein wichtiger Parameter. Es wurde
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35

Maluk, Cristian. "Development and application of a novel test method for studying the fire behaviour of CFRP prestressed concrete structural elements." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/15926.

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A novel type of precast, prestressed concrete structural element is being implemented in load-bearing systems in buildings. These structural elements combine the use of high-performance, self-consolidating concrete (HPSCC) and non-corroding carbon fibre reinforced polymer (CFRP) prestressing tendons; this produces highly optimized, slender structural elements with excellent serviceability and (presumed) extended service lives. More widely, the use of new construction techniques, innovative materials, and ground-breaking designs is increasingly commonplace in today's rapidly evolving building c
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Lukic, Bratislav. "Mise au point d'une technique de mesure de champs pour la caractérisation du comportement dynamique du béton en traction." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAI028/document.

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Ce travail thèse a pour objet une méthode expérimentale combinant un essai de traction indirect par écaillage et une mesure de champs à partir d’images obtenues par caméra ultra rapide, ceci à des fins d’identification des propriétés de rupture du béton sous chargement de traction dynamique. Cette méthode, proposée dans la littérature peu de temps avant le démarrage de ces travaux, fait ici l’objet d’une étude approfondi ainsi que d’une série de développements et d’amélioration. Les images obtenues sont traités par une technique de grille et la méthode des champs virtuels est appliquée pour id
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Zhu, Honggang. "Development of epoxy-organoclay nanocomposite as high performance coating and as matrix material of durable GFRP composite for civil engineering applications /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202009%20ZHU.

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38

Malmros, Catrine, and Johnson Andrea. "Brandpåverkan på skyddskonstruktioner i funktionsskyddsrum : En undersökning av resthållfasthet i betongbalkar." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-40032.

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In the beginning of the 21st century decisions were made regarding the decommission of the total defence in Sweden. Since then the security policy situation has changed, regarding both the risk of war and other types of treats such as terrorism. Due to this the total defence is now being re-established. The Swedish Fortifications Agency and Research Institutes of Sweden (RISE) has initiated the Centre of excellence for fortification (CFORT) to support the development of competence in fortification. In case of a crisis or war secured function shelters constitutes a significant part of the Swedi
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Ehlig, Daniel, Frank Jesse, and Manfred Curbach. "Stahlbetonplatten verstärkt mit Textilbeton unter Brandbelastung." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244050720109-69672.

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Im Rahmen experimenteller Untersuchungen wurden Stahlbetonplatten hergestellt, mit verschiedenen textilen Bewehrungen verstärkt, mit 125 % Gebrauchslast vorgeschädigt und anschließend unter Gebrauchslast mit einer Brandbelastung nach der Einheitstemperaturkurve (ISO-834, Cellulosic curve) beaufschlagt. Alle Platten hielten der Brandbelastung bei gleichzeitiger Biegebeanspruchung mehr als 60 Minuten stand und zeigten weder Betonabplatzungen noch andere optische Schädigungen auf. Die für dieses überraschend positive Ergebnis verantwortlichen Mechanismen werden diskutiert, sind aber noch nicht vo
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40

Jablonská, Markéta. "Ověření skutečných fyzikálně-mechanických parametrů kompozitního materiálu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240445.

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Diploma thesis deals with composite materiál and it is dedicated to steel fiber concreat. The thesis focuses on verification of mechanical parameters of the steel fiber concrete. Especially on the compressive (tensile) strength at first cracking and the compressive strength in cracked state. Testing was conducted on concrete different tensile with 30 kg on m3 steel fibers KrampeHarex DE 50/1,0 N. The thesis is divided into theoretical and experimental part.
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Dvořáková, Michaela. "Studium chování betonu při působení vysokých teplot." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226711.

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The aim of this diploma thesis is to focus on the resistance of concrete exposed to high temperatures especially with focus of resistance against explosive spalling as well as clarifying the mode of action of various types of polypropylene fibres. The theoretical part is an introduction to the issues of explosive spalling, its mechanisms and majority influencing factors. Further description of the processes taking place in the structure of concrete under extreme thermal load, distribution and size of pores in concrete, thermal load, temperature-time curves and their applications, methods of el
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Silva, Janaina Salustio da. "Estudo de concretos de diferentes resist?ncias ? compress?o submetidos a altas temperaturas sem e com incorpora??o de fibras de politereftalato de etileno (PET)." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/14844.

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Made available in DSpace on 2014-12-17T14:48:14Z (GMT). No. of bitstreams: 1 JanainaSS_DISSERT.pdf: 4645317 bytes, checksum: 1f500f6eaf05e8ac34d38ba500240ab2 (MD5) Previous issue date: 2013-04-22<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>The reinforced concrete structures are largely used in buildings worldwide. Upon the occurrence of fire in buildings, there is a consensus among researchers that the concrete has a high resistance to fire, due mainly to its low thermal conductivity. However, this does not mean that this material is not affected by exposure to high tem
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Phan, Minh Tuyen. "Modélisation explicite de l’écaillage sous incendie du béton : approche thermo-hydro-mécanique avec des conditions aux limites évolutives." Thesis, Paris Est, 2012. http://www.theses.fr/2012PEST1155/document.

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Dans les dernières années, les incendies majeurs dans les tunnels ont causé des dommages importants. Dans ces conditions extrêmes (la température dépasse rapidement 1200 °C), l'augmentation de pression dans les pores, la dilatation thermique empêchée, l'incompatibilité de dilatation thermique entre la pâte du ciment et des granulats, la déshydratation ... sont des principaux mécanismes de dégradation qui peuvent être à l'origine de l'écaillage. L'écaillage progressif pendant l'incendie se manifeste par le détachement de la surface du béton par petits morceaux réduisant ainsi la section résista
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Meruňka, Milan. "Analýza objemových změn cementových kompozitů s ohledem na optimalizaci dávkování jemných složek." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409766.

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The diploma thesis deals with the determination of the influence of the maximum density of the cement matrix on the volume changes of concrete, the influence of different admixtures or their combinations on the development of hydration temperatures and on the water separation of concrete. The theoretical part describes the various types of volume changes of concrete, the effects of individual input components and mineral admixtures on water separation, hydration heat development and concrete microstructure. The experimental part is focused on monitoring not only the volume changes of concrete
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Šottl, Jiří. "Vývoj správkové malty s odolností proti vysokým teplotám." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226731.

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Currently, increasing reinforced concrete structures and concrete structures that require repair in the form of remediation. The master’s thesis deals with the development of repair mortars with resistance to high temperatures, which would allow the re-profiling of the fire damaged parts of the structures and restore its function. Development of repair mortars is based on a literature review of articles dealing with research materials resistant to high temperatures.
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Sultangaliyeva, Fariza. "Formulation of fluid fire-resistant fiber-reinforced cementitious composite : Application to radioactive waste disposal." Thesis, Pau, 2020. http://www.theses.fr/2020PAUU3041.

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Le but de ce travail est de développer un béton fluide résistant au feu renforcé en fibres de polypropylène pour les colis de stockage des déchets radioactifs de moyenne activité à vie longue. Le défi de ce travail consiste à utilizer des fibres de polypropylène qui, même ajoutées en petite quantité, améliorent la résistance au feu mais diminuent de manière significative la maniabilité des bétons frais. Des essais à l’échelle du laboratoire sont effectués afin d’évaluer les comportements rhéologique et à haute température des matériaux cimentaires contenant des fibres de polypropylène. Dans la
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Bartholomei, Márcio Bento. "Estudo de concreto auto-adensável com a utilização de materiais da região de Manaus e resíduo de vidro como modificador de viscosidade." Universidade Federal do Amazonas, 2013. http://tede.ufam.edu.br/handle/tede/3473.

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Made available in DSpace on 2015-04-22T22:08:45Z (GMT). No. of bitstreams: 1 Marcio Bartholomei.pdf: 2499347 bytes, checksum: 6b31cbfe2379597e5c48f869551b9c94 (MD5) Previous issue date: 2013-01-15<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Currently concrete performs a very important role in contemporary society´s development. Their benefits to society come from its variety of applications, being used in diverse types of constructions. Among the many kinds of existing concretes, the self-compacting one is highlighted once it is of a superior technology if compared
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Barhum, Rabea. "Mechanisms of the interaction between continuous and short fibres in textile-reinforced concrete (TRC)." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-143501.

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This thesis reports on experimental investigations of the mechanisms inherent in the joint action of short and continuous fibres in high-performance, cement-based composites. Experiments on different levels of observation (macro- meso- and micro-levels) were performed to provide detailed insights into the various effects of adding different types of short fibres (dispersed AR glass, integral AR glass and dispersed carbon fibres) on the strength, deformation, and failure behaviour of textile-reinforced concrete (TRC) subjected to tensile loading. Moreover, visual inspections of the specimens' s
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Sovová, Kateřina. "Studium chování vysokopevnostních betonů při působení vysokých teplot." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-295664.

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This master’s thesis is divided into two parts; practical and theoretical. The theoretical part of this study describes the influence of high temperature on concrete structure and chemical, mechanical and physical changes, which take place during the exposure to high temperatures. The thesis also evaluates spalling of concrete and the methods to prevent it, as well as the function of polypropylene and cellulose fibers in the concrete. The practical part deals with design, production and testing of the cement-based concrete with the use of different fibers (polypropylene fibers and cellulose fi
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Fiala, Jiří. "Studium chování betonů při působení vysokých teplot." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227178.

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This thesis deals with the behavior of cement concrete at high temperature with a focus on the impact behavior of aggregate, cement type and polypropylene fiber reinforcement. The theoretical part describes the issue of cement concrete at high temperatures, especially processes in the cement matrix, aggregates and polypropylene fibers. Furthermore, theoretical part describes the selection of a suitable type of cement and aggregates in concrete exposed to high temperatures. In the experimental part was designed the concrete composition with various kinds different types of aggregates and two ty
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